Ingredient review

Stearoyl Dihydroxy Isobutylamide Stearate

INCI: Stearoyl Dihydroxy Isobutylamide Stearate

A synthetic thickener and stabilizer that helps give creams and sticks a smooth, non-greasy feel with low irritation risk.

beautyskincarethickener

In plain English

This is a man-made ingredient that acts like a wax to make lotions and creams thicker and more stable. It helps prevent the oil and water parts of a product from separating, and gives a smooth, silky texture without feeling heavy or greasy on the skin.

Review score

Safety, usefulness, and evidence

3.5Good
3.5/ 5

Potentially useful with some tradeoffs

The evidence base is useful, but some claims depend heavily on the formula.

Risk flags are low for most users, though the finished product can still irritate.

Source
synthetic
Evidence
moderate
Irritation
low
Clogging risk
low
How reviews are scored

Quick decision guide

Useful, but context matters

Stearoyl Dihydroxy Isobutylamide Stearate is generally a lower-concern ingredient when the full formula suits your skin.

Plain-English read

Treat this as a practical screening step before you compare products that contain this ingredient.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Stearoyl Dihydroxy Isobutylamide Stearate.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.

Score terms in plain English

Irritation risk

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A synthetic amide wax derived from stearic acid and an isobutylamide compound, designed to increase viscosity and improve the feel of cosmetic products.

How it works

It forms a network within the product's oil phase, thickening the formula and helping to keep oil and water mixed together. This stabilizes the emulsion and gives a creamy, spreadable texture that feels light on the skin.

Pros

Smooth texture

Creates a silky, non-greasy feel that spreads easily on the skin, making products more pleasant to use.

Stable formulas

Helps keep creams and lotions from separating, so the product stays consistent from first use to last.

Cons and cautions

Synthetic origin

Made in a lab rather than from natural sources, which may be a drawback for those seeking natural or organic skincare.

Limited research

There is not a lot of published research on how this ingredient interacts with skin over long periods, though short-term use appears safe.

Best for

  • People who prefer lightweight, non-greasy creams
  • Those with normal to oily skin looking for a smooth finish

Use caution if

  • Individuals seeking 100% natural or plant-based ingredients
  • Those with known sensitivity to synthetic waxes (rare)

Usage tips

Use in oil-based or emulsion products at 1-5% for best thickening results.
Combine with other waxes or fatty alcohols for a customized texture.

Safety summary

Generally considered safe for topical use at typical concentrations. Low irritation and comedogenic risk. No significant safety concerns have been reported in cosmetic use.

Research notes

Limited peer-reviewed studies specifically on this ingredient. Safety is inferred from its chemical class and long history of use in cosmetics. No known toxicity or sensitization issues.

Common label clues

Typical concentration
0.5% to 5%
Regulatory status
Approved for use in cosmetics in the US, EU, and other major markets. No known restrictions at typical use levels.
Common uses
Creams, Lotions, Lipsticks, Stick products
Environmental note
As a synthetic compound, its biodegradability is not well-documented. It is not derived from plants, so it does not contribute to agricultural land use.

Good to know

  • Often used in stick products like lip balms and deodorants to provide structure.
  • It is not water-soluble, so it works best in the oil phase of a formula.

Common questions

What is Stearoyl Dihydroxy Isobutylamide Stearate in beauty products?

This is a man-made ingredient that acts like a wax to make lotions and creams thicker and more stable. It helps prevent the oil and water parts of a product from separating, and gives a smooth, silky texture without feeling heavy or greasy on the skin.

What does Stearoyl Dihydroxy Isobutylamide Stearate do in a beauty product?

It forms a network within the product's oil phase, thickening the formula and helping to keep oil and water mixed together. This stabilizes the emulsion and gives a creamy, spreadable texture that feels light on the skin.

Is Stearoyl Dihydroxy Isobutylamide Stearate safe for most people?

Generally considered safe for topical use at typical concentrations. Low irritation and comedogenic risk. No significant safety concerns have been reported in cosmetic use.

Who should be careful with Stearoyl Dihydroxy Isobutylamide Stearate?

Individuals seeking 100% natural or plant-based ingredients Those with known sensitivity to synthetic waxes (rare)

Research sources

CosIng (EU Cosmetic Ingredient Database)OpenPubChem Compound SummaryOpen

Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.